They never open their mouths without subtracting from the sum of human knowledge.
Most new things are not good, and die an early death; but those which push themselves forward and by slow degrees force themselves on the attention of mankind are the unconscious productions of human wisdom, and must have honest consideration, and must not be made the subject of unreasoning prejudice.
To say that a thing has never yet been done among men is to erect a barrier stronger than reason, stronger than discussion.